Monitor unit



FIG. 1 is a front view of a monitor unit showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottomview thereof; and,

FIG. 7 is a rear perspective view thereof.

The broken lines in the Figures show portions of the monitor unit thatform no part of the claimed design.

CLAIM The ornamental design for a monitor unit, as shown and described.